Roasting-furnace attachment.



PATBNTED Nov. 24, 190s-,

D. D. L J. 0. BAILEY. ROASTING TURNAGB ATTACHMENT.

APELIOATION FILD MAY 27, 1903.

N0 MODEL.

/ltnessesf- Wie/nam Ientyzm me mms PET: s co nuovo LITH lharTnn STriTns Patented November 24:, 1903.

PATTNT Trina.

DRURY D. BAILEY AND JAMES OSBURN BAILEY, OF BANNER, CALIFORNIA.

ROASTENGWFUHNACE ATTACHMENT.

SPECIFICATION forming part of Letters Patent No. 744,992, dated November 24, 1903.

Application iiled May 27,1903.

To @ZZ whom it may concern:

Be it known that we, DRURY D. BAILEY and JAMES OsBUnN BAILEY, citizens of the United States, residing at Banner, county of San Diego, State of California, have invented an Improvementin RoastingFurnace Attachments; and We hereby declare the following to be a full, clear, and exact description of the same.

Our invention relates to roasting-furnaces and attachments forfeeding the ore the1eto,1'e moving and amalgamating the roasted ore, and condensing the volatile products of the roast, the whole forming a continuous apparatus, the parts of which operate in unison.

It consists in connected mechanism and details of construction, which will be more fully explained by reference to the accompanying drawing, in which the figure is a longitudinal vertical section of our apparatus.

It is the object of our invention to provide an apparatus in which the ore is fed to a roasting-furnace through a conducting-pipe, Which is inclosed by a flue carrying the heated products of combustion from the furnace, so that the ore is gradually raised in temperature as it approaches the furnace, while it is roasted, and is continued through the pipe to an amalgamating device carried with the pipe and provided with a scrubbing or polishing device. The upperend of the ore-con veyer is connected with a feed vapparatus and beyond this with devices by which a sufflcient vacuum is produced to withdraw any fumes produced by the roasting and convey them to a condenser.

As shown in the drawing, A represents a furnace of any suitable or desired construction, having an escape-flue 2 leading to a smoke-stack or chimney 3. Within this escape-flue and substantially centrally supported is a pipe 4t, made of any suitable or desired diameter for the Work to be done. This pipe is inclined, as is also the fine 2, and it extends through the flue from the smokestack end to the furnace, so that the heat produced in this flue will be transmitted to the ore passing through the pipe 4, and the temperature will be gradually raised until it reaches the furnace A, through which the pipe passes, and during the passage of the ore through this portion of the pipe it is sub- Serial No. 158.951. (No model.)

jected to sufiicient heat to roast it. This passage or flue 2 may be made in any suitable manner, either in the form of an arch, of,

brick, concrete, or ehersuitable material, or if the contour of the ground is suitable it may be formed by digging a ditch and covering it with tiling, so that the pipe et will be inclosed. By this construction a small amount of fuel is effective for a very considerable amount of work. The flue may turn off to one side to connect with the chimney or stack, while the pipe continues on in a line beyond this point. The pipe is properly supported on rollers or antifrietional bearings, so that it may be revolved upon ils axis by any suitable mechanical devices, such as gears, chain and sprocket-wheel, or vthe like. This revolution causes the ore to be continually lifted up the side of the pipe and again dropped, and by reason of the incline of the pipe it will gradually move forward and passes through the furnace, as before described. Beyond the furnace the pipe extends as far as may be desi-red to allow the ore to gradually cool, and at the lower end the pipe is enlarged to form a cylindrical chamber 5, which is adapted to contain mercury, the mercury always lying in the lower part of the chamber While the pipe and chamber revolve. The pipe is `again reduced be vond the chamber 5. The ore passing out the lower end of the pipe at this point will fall into the mercury and any free gold will be amalgamated therein. able to scrub the ore or brighten or break it up, We have shown a chain lying in the pipe,

as at 6, with a turnbuckle on the upper end,

connecting the chain with a bolt 7, which eX- tends transversely through the pipe and holds the chain in place. The rotation of 'the pipe causes the chain to be continually lifted up the side and dropped back upon the ore to scrub and break up the ores The turnbuckle prevents the chain becoming kinked as the pipe rotates. lf it be desired to introduce water at this point of the apparatus, it may be done by means of a pipe S, leading into the lower end of the ore-carrying pipe 4. The open lower end of the pipe allows air to pass in to assist in the roasting and to produce a draft sufficient to carry the fumes up through the pipe.

If it be found desir- 7c IOO ` discharged.

9 represents an ore-feeding passage leading from a bin or receptacle of any kind and discharging the ore into the pipe 1l, with which it is connected, so that it may be delivered into the upper end of the pipe 4. W'ithin the pipe 4 at this'point is a fume-pipe having an exterior screw or spiral 10, which assists in feeding the ore downwardly through the outer pipe and prevents choking at this point.

Telescoping into the feed-pipe et and in line with it is a pipe 11, through which the fumes and gases produced by the roasting will be This pipe connects through .a Y or other suitable coupling with a dischargepipe 12, and through this pipe the gases and vaporized products of the roasting are caused to pass by means of a jet of steam, air, or Water admitted through a pipe 13 and discharged into the pipe 12 through a reduced portion or nozzle, as at 14, so as to produce a draft or suction which will insure the gases being removed through the pipes 11 and l2 and delivered into acondensing-tank or the like, as shown at 15.

The pipes 9, 11,12, and 13 are all connected together and are stationary, and the pipe 11 extends into the end of pipe 4, as shown.

Having thus described our invention, what we claim, and desire to secure by Letters Patent, is-

1. The combination in an ore-roasting apparatus of a furnace having an inclined discharge-tine, a pipe extending substantially -central through said flue and through the beyond the furnace, a chain or equivalent scrubbing device, and means for supporting it within the flue extension and an amalgamating device carried by the discharge end of the pipe.

3. The combination with a roasting-f u rnace having the inclined discharge-Hue connecting it Witha smoke-stack ot a pipe journaled and revoluble substantially central Within the flue and through the furnace, a feed device whereby ore is supplied to the upper end of said pipe and caused to travel through it whereby it is heated and roasted within the furnace and its flue, a discharge and amalgamating device carried by the extension of the pipe beyond the furnace.

4.. The combination with a roasting -furnace, a dischargeue leading therefrom, and a smoke-stack, of an ore-conveying pipe journaled and revoluble substantially central within the flue and through the furnace, a feed device whereby ore is supplied at the upper end of said pipe, an extension of the pipe open at the lower end to admit air and having an amalgamating attachment thereto, an extension of the pipe at the upper end, and a draft device whereby the gaseous products of the roasting are Withdrawn and a condenser into which they are discharged.

5. A furnace, an inclined iiue extending therefrom, a centrallydisposed revoluble roasting-chamber extending through the tlue across the furnace and having its discharge end projecting beyond the furnace, a tubular fume-conducting pipe fixed Within the upper end of the revoluble chamber, and having an exterior conveyer-screw, and an ore-feed pipe contiguous to the screw.

6. A furnace, an inclined flue therefor, a central revoluble roasting-chamber extending through the flue and discharging beyond the furnace, a tubular fume-conducting pipe fixed in, and revoluble with the roastingchamber and a conVeyer-screw upon its exterior, a stationary pipe entering the upper end of the roasting-chamber, and into which the fume-pipe projects, an ore-feed pipe connected with the stationary pipe contiguous to the roasting-chamber, and a draft connection with the end of the stationary pipe, for the removal of the fumes.

In witness whereof we have hereunto set our hands.

DRURY D. BAILEY. JAMES OSBURN BAILEY. Witnesses:

M. JAcoBY, C. W. BAILEY. 

